Question for the painters help with "foggy" paint - NCRS Discussion Boards

Question for the painters help with "foggy" paint

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  • Michael L.
    Extremely Frequent Poster
    • December 15, 2006
    • 1387

    Question for the painters help with "foggy" paint

    Guys,

    I've been painting chassis/suspension parts for years with no problems. Of course the room for error on those parts is large but I've had good results. I recently decided to try to start doing some of the painting on the body when the situation calls for it. I decided to practice on the rear bumper of my 2010 Mercedes that had gotten rear ended a number of years ago. I removed the bumper and repaired the damage. I've tried twice now to paint it and the finish always comes out poor. I'm using Nason base/clear system. The first time, I used the standard medium reducer. Thinking it was drying too fast, the second time I used their slow reducer but both times there is a lot of fog in the paint. I'm in TX and I'm doing this around my day job etc and I can only do it when I can do it which means the middle of the day. With the lights in my little "paint booth" (plastic tarps) and the 105 degrees outside it is easily 110-115 degrees in the booth when I spray. I'm guessing I'm still drying too fast? I've asked and this Nason system doesn't have a retarder for it. What are my options at this point? Wait until the Fall? What about another system that has a retarder? See the pics below for what it looks like. I was very meticulous about gun set up and it seems to go on OK but just dries looking like this. Thanks for your help.

    Mike

    MB rear bumper A.jpgMB rear bumper.jpg
  • Patrick H.
    Beyond Control Poster
    • December 1, 1989
    • 11608

    #2
    Re: Question for the painters help with "foggy" paint

    Are you attempting to paint and clear only one portion of the bumper?
    Vice-Chairman (West), Michigan Chapter NCRS
    71 "deer modified" coupe
    72 5-Star Bowtie / Duntov coupe. https://www.flickr.com/photos/124695...57649252735124
    2008 coupe
    Available stickers: Engine suffix code, exhaust tips & mufflers, shocks, AIR diverter valve broadcast code.

    Comment

    • Mark E.
      Extremely Frequent Poster
      • April 1, 1993
      • 4498

      #3
      Re: Question for the painters help with "foggy" paint

      Blushing paint ("fog" as you say) is caused by moisture in either the compressed air source or the atmosphere. Only the most experienced painters can make it work during a hot, humid day in Texas.

      Wait for a low humidity, moderate temperature day and make sure the compressed air is dry using a good water trap. Keep the petcock on the bottom of the tank cracked open too.
      Mark Edmondson
      Dallas, Texas
      Texas Chapter

      1970 Coupe, Donnybrooke Green, Light Saddle LS5 M20 A31 C60 G81 N37 N40 UA6 U79
      1993 Coupe, 40th Anniversary, 6-speed, PEG 1, FX3, CD, Bronze Top

      Comment

      • Michael L.
        Extremely Frequent Poster
        • December 15, 2006
        • 1387

        #4
        Re: Question for the painters help with "foggy" paint

        Yeah I figured it was the heat/humidity that was killing me. I have two standard moisture drains on the line and I have the QC3 air filter and dryer too but it may not be enough. I think I'll just have to wait until October rolls around.

        No, Patrick, I'm base coating the whole bumper. That is just the base coat you see on the bumper there.

        Comment

        • James G.
          Very Frequent User
          • August 22, 2018
          • 783

          #5
          Re: Question for the painters help with "foggy" paint

          Try running a bulb filter right before the gun, I have had warm air cause condensate inside the hose which laid on a cooler floor.
          James A Groome
          1971 LT1 11130 - https://photos.app.goo.gl/zSoFz24JMPXw5Ffi9 - the black LT1
          1971 LT1 21783 - 3 STAR Preservation.- https://photos.app.goo.gl/wMRDJgmyDyAwc9Nh8 - Brandshatch Green LT1
          My first gen Camaro research http://www.camaros.org/forum/index.p...owposts;u=4337
          Posts on Yenko boards... https://www.yenko.net/forum/search.php?searchid=826453

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